<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=Windows-1252">
<TITLE>Through hole pin</TITLE>
</HEAD>

<BODY BGCOLOR="#FFFFFF" TEXT="#000000">

<OBJECT TYPE="application/x-oleobject" CLASSID="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
	<PARAM NAME="Keyword" VALUE="Through hole pin">
</OBJECT>

<P><A NAME="idh_through_hole_pin"></A><font size=5><U>Through hole pin</U><br>&nbsp;</font></P>

<P><IMG SRC="../images/through_hole.gif" ALT="" BORDER=0></P>

<P>In the above figure a through hole pin is shown.</P>

<P>After soldering this through hole pin will look like</P>

<P><IMG SRC="../images/through_hole2.gif" ALT="" BORDER=0></P>

<P>After the bottom side of the PCB has gone through a solder bath, all copper areas at the bottom of the PCB are soldered. The copper areas on the bottom PCB side which are covered with solder resist, are not soldered.</P>

<P>Usually the anti pad for the solder mask is 8 mil greater than the copper pad. The size of +8 mil for the solder mask, is because of tolerances.</P>

</BODY>
</HTML>
